全局变量未定义 - Python

Question

我有全局变量的问题.它返回错误

search = Search.Search(pattern,b)
NameError: global name 'b' is not defined   

但我已经定义了这个全局变量.我试着把它放到搜索功能中.我认为在Windows上没有问题.我正在尝试在Linux/Unix上运行这个程序.

您对如何避免此错误有任何建议吗？

# -*- coding: utf-8 -*-
from flask import Flask
from flask import request
from flask import render_template


import Search
import B

app = Flask(__name__)

global b

@app.route('/')
def my_form():
    return render_template('my-form.html')

def setup():
    global b
    b = B.B()  

@app.route('/', methods=['POST'])
def search():
    global b
    from time import time

    pattern = request.form['text']
    ...
    se = Search.Search(pattern,b)
    ...
    ...
    ...

app.debug=True
if __name__ == '__main__':
    setup()
    app.run()

Answer 1

app = Flask(__name__)

global b

global b这里的声明实际上并没有为您创建变量.你需要自己分配一些东西.

app = Flask(__name__)

b = None #or whatever you want the starting value to be